2024/12/28 by V. M. López-Guerrero, López-Guerrero, V. M., M. A. Arroyo-Ureña +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2412.20242
openalex publication_date 2024/12/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the production and possible detection of a single Higgs boson in association with a top quark in proton-proton collisions (pp → th + X) at the High-Luminosity Large Hadron Collider. This process absent in the Standard Model is predicted by other models such as the Two-Higgs Doublet Model of type III, which is the theoretical framework adopted in this work. Promising results are found for specific scenarios of the model parameter space, which consist mainly of the parameters tanβ, cos(α-β) and the parameter χtc, responsible for the Flavor-Changing Neutral Scalar Interactions (FCNSI). Using the machine learning Boosted Decision Trees algorithm and considering a systematic uncertainty of 5%, we predict signal significances at level of 5σ for tanβ=1, cos(α-β)=0.1, χtc=5, and integrated luminosities L\rm int\gtrsim2700~fb-1. Likewise, we also predict a signal significance σ≈ 4.4 for tanβ=1, cos(α-β)=0.1, χtc=3, and integrated luminosities L\rm int = 3000~fb-1, which consider the upper limit given by HL-LHC projection on BR(t→ ch).